Astral Pool 50mm Union O-Ring | Hurlcon | SKU 70003

Astral Pool 50mm Union O-Ring – SKU 70003

A leaking pool filter or pump union is almost always caused by a worn or damaged O-ring. This genuine Astral Pool (Hurlcon) 50mm union O-ring (SKU 70003) is the correct replacement for 40mm and 50mm tail unions across a wide range of Astral pool equipment — a simple, low-cost fix that stops leaks fast.

Note: The image shows the O-ring seated on a union tail for reference. The tail fitting is not included — this listing is for the O-ring only.

Compatibility

• Astral Pool / Hurlcon ZX Series
• Astral RX Series
• Astral FG Series
• Astral E Series
• Suits 40mm and 50mm tail unions

Product Specifications

• SKU: 70003
• Size: 50mm
• Brand: Astral Pool (Hurlcon)
• Application: 40mm and 50mm tail unions
• Note: Sand filter union 40mm O-ring is a different part — use part number 75109 for sand filter unions

Frequently Asked Questions

How do I know if my union O-ring needs replacing?
If you notice water leaking from the union connection between your pump and filter, or from any pipe union fitting, the O-ring is the most likely cause. O-rings harden and crack over time due to UV exposure and pool chemicals, causing them to lose their seal.

Is this the right O-ring for my Astral sand filter union?
No — this O-ring (SKU 70003) is for cartridge filter and pump unions (40mm and 50mm tail unions). For Astral sand filter 40mm unions, you need part number 75109, which is a different size.

What size union does this O-ring fit?
This O-ring fits both 40mm and 50mm tail unions on Astral Pool / Hurlcon equipment.

Is the tail fitting included?
No — this listing is for the O-ring only. The tail union shown in the product image is for reference purposes only.